High Quality, Transferable Graphene Grown on Single Crystal Cu(111) Thin Films on Basal-Plane Sapphire

TL;DR

This paper demonstrates a method to grow high-quality, large-area graphene on single-crystal Cu(111) thin films on sapphire, enabling transfer to other substrates while reducing costs and damage compared to bulk single-crystal Cu methods.

Contribution

It introduces a novel approach for growing high-quality graphene on epitaxial single-crystal Cu(111) thin films on sapphire substrates.

Findings

High-quality graphene can be grown on Cu(111) thin films.

The method allows transfer of graphene to other substrates.

Potential reduction in cost and damage compared to bulk single-crystal Cu methods.

Abstract

The current method of growing large-area graphene on Cu surfaces (polycrystalline foils and thin films) and its transfer to arbitrary substrates is technologically attractive. However, the quality of graphene can be improved significantly by growing it on single-crystal Cu surfaces. Here we show that high quality, large-area graphene can be grown on epitaxial single-crystal Cu(111) thin films on reusable basal-plane sapphire (alpha-Al2O3(0001)) substrates and then transferred to another substrate. While enabling graphene growth on Cu single-crystal surfaces, this method has the potential to avoid the high cost and extensive damage to graphene associated with sacrificing bulk single-crystal Cu during graphene transfer.